The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
Jun. 12, 2003
Michael L. Dorrough, Woodland Hills, CA (US);
Dennis Robert Lee, Van Nuys, CA (US);
Alfred Edward Parker, Hicksville, NY (US);
Richard Williamson Burden, Winnetka, CA (US);
Michael L. Dorrough, Woodland Hills, CA (US);
Dennis Robert Lee, Van Nuys, CA (US);
Alfred Edward Parker, Hicksville, NY (US);
Richard Williamson Burden, Winnetka, CA (US);
Other;
Abstract
In an AM system directed to commercial broadcasting, a pure unmodulated (CW) carrier signal and two sideband signals are generated and processed separately as three independent signals that are summed as output of a final linear mixer. The sideband signals are derived independently utilizing audio spectrum-sharing based on complementary comb filtering, quadrature phase-shifting at both audio and carrier sideband frequencies, and exclusive alternate toggling at a designated switching rate between the two sidebands so that at any instant in time only one of the two sidebands is present along with the continuous carrier. The overall performance provides the capability of advantageous modulation beyond the conventional 100% modulation limit.